Computing scale



` 1,619,121l March 1 1927. H. o. HEM

COMPUTING SCALE Original Filed Aug. 9, 1920 3 Sheets-Sheetl Snowdon HM/W a. C/zm/ March 1,1927. f 1,619,121

H. O. HEM

COMPUTING SCALE Original Filed Aug. 9. 1920 3 Sheets-Sheet 2' K' x fr' @2' Half/vz 'lima l; l i 33% www 1,619,121 H. '0. HEM

COMPUTING SCALE Original Filed Aug. 9, 1920 5 Sheets-Sheet 5 March' l 1927.

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Patented Mar. 1, 19.27.

Ivivirla!) STATES PATENT OFFICE.

HALVOR O. HEM, OF TOLEDO, OIEIIO, ASSIGNOR TO TOLEDO SCALE COMPANY, `0F TOLEDO, OHIO, A CORPORATION OF NEW JERSEY.

COMPUTING SCAIJE.

Application led August 9, 1920, .Serial No. 402,303. Renewed July 26, 1926.

Another object is the-provision of a project-ing computing scale which showsin' large figures upon a screen the money value of a commodity at any selected price, as well as the weight thereof.

Another .object is the rovision of a4 projecting scale which indicates weights and money values on the customers side of the scale as well as on the merchants side.

Still another object is the provision of a simple and efficient price selecting mechanism.

Other objects and advantages will be ap.- parentv from the fellowing description, in which reference is had to the accompanying drawings illustrating preferred embodiing lscale embodying my invention, part ofv ments of my invention and wherein Similar reference numerals designate similar parts. l A

tammg the mdlcatmg mechanlsm.

throughout the several views.

In the drawings Figure 1 is a front elevation of a weighthe housing being broken away; -Figure 2Yis an enlarged fragmentary elevation showing the pendulums andthe connectionof the indicator therewith; f Figure 3 is an enlarged front elevation of the head of the scale, arts being in section along theline 3- -3 of igure 4;

Y igure 4 is a sideview of the head ofthe scale, parts beingin section;

Fgure isasecti'nalplan the arrangement' ofthe lights and projecting lenses; Figure 6 is afragmentary'elevation' showadjustable connection for -the chart; chg-t igure'' is a fragmentary detail of the f 8 is a frontelevaton of a modi- 'led embodimentfof my invention; i

view showingV Figure 9 is a side view, partly in section, of' the scale shown in'Figure 8;

' Figure l0 is an enlarged sectional plan of the projecting apparatus; and f Figure l1 is an enlarged fragmentary ele vation, with parts in section, showing means for retaining the projecting apparatus shown in Figure 9 in elevated position.

Although I have shown my invention as embodied in scales of the pendulum type, it is to be understood that this showin is merely illustrative and that I contemp ate its use in scales having load-counterbalancing mechanism of other types, such, for instance, as springs.

In the form of scale shown in Figures 1 to 7 inclusive, the base 1, which may be of any preferred form, supports a base horn 2 upon which is fulcrumed the main lever 3 of the scale, this lever being adapted to carry the usual commodity-receiver (not shown) Supported upon the rear end'of the base,

lis an upright housing, the lower section 4 of which is shaped somewhat like a watch casing and contains the load-offsetting mechanism of the scale, the upper section 5 of the housing being box-shaped and contor. 9,- and .to each sector 9 is a `leible metallic ribbon l() which overlies"the curved Yface of the sector and has its lower end connected to the rear end of the main lever 3. It is apparentthat when a load is placed upon the scale'the rear end of the` 1ever3f.w1ll be pressed downwardly, thereby a downward ull onthe ribbons 10 and swmging the pen ulums .upwardly and outwardly until the 'load 'is eounterbalanced..

Secured to each pendulum and oppositely to the power sector .9 is an indi. cator operating sector 12, thefrdius of the sector 12: Y considerably greater.

the radius of the sector 9. Depending from each of the sectors 12 is a ribbon '13, the lower end of which is attached to a. light frame consisting of an inverted U-shapcd member 14, the arms of which are connected by a rod 15. i As shown in Figures and 2, the pendulums and sectors 12 are oppositely offset so that the parts will not interfere as the pendulums swing and the rod 15 rises.

Projecting upwardly from the bight of the U-shaped member 14 and extending into the box-like housing section 5 is a vertical rod 16, and secured to the upper end JVof the rod 16 by beans of the adjusting device shown in Figure 6 is a chart frame 17 carrying a pair of charts 1S. The adjust! able connection between the rod 16 and chart frame 17 consists of a pair of lilcinbers 19 and 20 spaced lby a ball 21 and connected by screws 22 and 23. By loosening one of these screws and tightening the other the frame may be moved angularly in its plane. Secured within the housing section '5 and extendin transversely Aof the scale are two pairs o guide rods2`4 and 25, and mounted upon the guide rods 24 is a slide 26, while a similar slide 27 is mounted upon `'the guide rods 25. The slides 26 and 27 have racks on their lowervsides which are engaged by pinions 29 and 30 xed to a shaft 31 extending between the charts 18 and journaled in the -front-and rear walls of the housing section 5. The forward end of the shaft 31 Yprojects through the housing wall and is provided with an operating handle 32 and a dial 33 which co-op- Y crates with a pointer 34 to indicate the exact position of the slides 26 and 27 for va purpose which will later appear. Fixed upon the right end ofthe slide 26 is a. lamp 35 between which andthe chart 18 is mounted a condensin lens 36, and fixed upon the right end o the slide 27 directly `opposite the condensin lens 36 Vis a projector 37. Since the sli es 26 and 27 are moved in the same direction and to the same extent by rotation o'f the shaft .31, the relative positions of the lamp 35, condenser 36 andr projector 37 are always the same.

An enclosed passage-38 extends from adjacent the rear sidel of the projector to the rearof the housing, thence downwardly, Aand thence l forwardly below the chartV and through the front housing wall. Mirrors 39 and 40 located at the turns of the passage relect the light therealong from the projector, and a ground glass-screen 41 is positioned adjacent the end of the passage to receive a 'jectorz The ground glass isprovided with greatly magnified image of theportion of .the chartbetween the condenser and proa reading lme, or a member may be arsha.

ed inconvenient position to throw a ow upon the ground glassto indicate the chart image that should be read. The portion of thel passage exlciuhng from lhc Aground glass 41 lo the housing wall forms a shadow box which prevents light from falling upon the ground glass i'rom outside sources and thereby dimming the image.

Fixed upon the left end of the slide 27 are a lamp 43 and a condenser 44, and lixed upon the left end ot' the slide 26 is a projector 45 which projects au innige of a portion ot the left chart 18 through a passage similar to the passage 38 (above described) but revcrsibly arranged so that its ground glass screen is visible from the rcar side of the scale.

Inscribed upon each chart 18 is a series oli columns of graduations, the first, third, fifth, etc. columns being identical and having gradual ions indicative of weight, while the alterna-te columns-tbe second, fourth, sixth, etcf-are graduated and marked lo indicate money values at various prices per pound. Owing to the fact that they are to be greatly magnified in the projection, the characters on the chart `may be very small`and the capacity of the chart may therefore be very great, even though the chart be of small size. For the same reason the scale may have a wide range of prices. The dial 33 is marked with the several prices per pound, and the chart, projector, dial and shifting mechanism are so related that the value projected upon the screen always corresponds to the price indicated upon the dial by the pointer 34. It is to be understood that when a money value is projecto-'l upon the screen, the weight indication from the adjoining column of the chart is also shown. The same weights and values are, of course, indicated upon the front and back screens.

The lamps 35 and 43 are in circuit with a switch 46, one contact of wh'ich is carried by a resilient member 48 adapted to be engaged by a projection 49 on the rod 15 when the scale is at zero position. When a load is placed upon `the scale the penduliimsswing upwardlyv and outwardly, elevating the sectors 12 which act through the ribbons 13 to raise the frame 14, 15. The switch 46 is thus allowed to close and the lamps are lighted. The weight of the article, together with its value at the particular .price indicated by the pointer 34, isv thrown upon both screens. Extreme upward move ment of the chartis ermitted by an opening in the -top of --tlhe housing, which is closed by means ofA a cap 50 into which the charts may move; vThe opening and the cap 50 also form a cupola ventilator to carry awa the heated air from the interior of the ousing. By turning the handle 32 any desired price may be brought into registration with the pointer and fthe correspondglass to the ing moneyvvalue will then be indicated ongle priceis indicated at one time, however,.

10v and the magnified images occupy such a large part of the screen area that the effect is substantially the same as though each appeared in the same position.

In Figures 8, 9 and 10 I invention as applied to a endulum scale having a chart rigidly fixe to the pendulum. The base l of this scale supports a base horn or fulcrum stand 2 upon which is secured the main lever 3a carrying a commodity-receiver of common form. Supporte ed upon the rear end of the base is an'upright housing, the lower portion 4" of which contains the load-offsetting pendulum, the upper portion 5a containing the chart and projecting apparatus. A load-offsetting pen dulunil 6 is 'connected to the lever 3 by means of a` flexible metallic ribbon 10, and carries an u wardl -extending arm 12a of light materi to w ich is fixed a transparent chart 18. Secilred within the upper portion of the housing is a pair of verti- -cally-extendiig guide rods 24, and mounted upon these r s is a slide 26 having adependinor rack secured theretoA which is engaged by a inion`29"A fixed upon the shaft 31 journale in the front and rear Walls of the housing. The forward end of the shaft j have shown my projects through` the housing wall and is f provided with an operating handle 32 and a dial 33 which co-operates with apointer 321i to indicate the exact position of the slide Fixed uponthe slide 26 forwardly of the chart 18 1s a lampk 35, and xed upon'the slide on the. opposite side of the chart, is a projector 37. An enclosed passage 38'.L extends 'from adjacent the rear side of the projector to the rear of the base housin thence 'laterally to adjacent the side of the ousing, z and thence forwardly through the front l wall. Mirrors 39 and 40* located at 'the turns of the passage reect they light there- 'along from. the projector, and a ground end of the passa e to receive a greatly mag- 4niiied image of t e portion of the chart belfore the projector. The ground lass is provided ,with .a vertical reading e, or an equivalent shadow is projected thereon. The [portion ofthe passage; extending from thedgw box which `prevents light from fallupon the ground glass' from outside sources and thereby dimming the The is with concentric curved glass screen 41"' is positioned adjacent the lper pound, a projector, and manually-open ousing wall forms a.I

rows of characters, rows of'weight indicating characters and money value characters alternating as in the form first deribed, and the dial 33al is correspondingly marked with theiseveral prices per pound. l

In order to prevent the projecting apparatus from accidentally sliding downwardly upon the guide rods 24, I have provided the handle `32with a cone-shaped detent 50 for selective engagementfwith a circular series 4of depressions in the wall of the housing 5", there `being one depression. for each price. As shown in Figure 11, the handle 32 and detent a are fixed to a slidably mounted shaft 51a upon which is a collar 52. The collar 52a isengaged by a spring 53a located Within a depression 54 in the` crank arm of the handle, whichy urges the detent into engagement with the notch'.

While it will be apparent that the illus.- trated embodiments of my invention herein disclosed are well calculated to adequately fulfill the objects primarily stated, it is to be understood that the invention is susceptible to variation, modification and change within the spirit and scope of the subjoined claims. n

Having described my invention, `I claim:

1. In a weighing scale, in combination, a chart having rows of graduations thereon, a projector adapted to project a real image of a portion of said chart, said chart andprojector being relatively movable, manually v operable means for moving one of said elements in one direction, and weighing mechanism connected to the other of said elements to move it in another direction.

2. In a weighing scale, in combination, a chart movable in one direction, a rojector movable over said chart in another irection, weighing mechanism for moving one of said elements, and manually-operable means for moving the other of said elements.

3. In a weighing scale, in combination, a chart having rows ofjmoney value characters, each row corresponding to a rice per unist of weight, a projector,' said c art and projector being relatively movable, weigh.- ing mechanism connected'to one of said elements, and manually-o erable means for se- ,lectively positioning t e other ofisaid elements according to prices per pound, whereby the money value of a load on the scale is indicated by said projector.

l 4. In a we ihing scale, in combination, weighing mec anism, a chart connected thereto and having rows of moneyv value characters, each row corresponding toa price able means for -sliiftin said v projector into position to project the ,c aracters of a selected row.

5. In a weighing scale, `in combination weighing mec lanism, a chart connec thereto, a projector co-operating with said l chart, and means for selectively positioning said projector according to prices per unit of weight.

6. In` a Weighing scale, in-combination, weighing mechanism, a chart `connected thereto, a projector co-operating with said chart, means for selectively positioning said projector according to prices per unit of weight, and means for indicating the price corresponding to the position of said projector.

7. In a weighing scale, in combination,

-weighing mechanism, a chart connected thereto, a projector tio-operating With said chart, manually-operable means for selectively positioning said projector according" to prices per unit ot' Weight, and means on said positioning means Jor indicating the price corresponding to the position of said projector.

8. In a Weighing scale, iii combination,

Weighing mechanism, indicating mechanism connected therewith, said indicating mechanism comprising a plurality of screens, and

means for simultaneously projecting identical indications upon said screens.

said charts upon said Screens.

11. In a weighing scale, in combination, Weighing mechanism, a pair of charts connected thereto, a pair of projectors eo-operating ,respectively with said charts, and

manually-operable means for Vshifting said 'projectors over said charts.

12. In a weighing scale, in combination, weighino' mechanism, a pair of charts connected thereto and inscribed with identical money values, a pair of projectors, one 'for each chart, and means for simultaneously positioning said projectors according to a price per unit' of Weight, whereby the same value, indication is projected by each projector. v

13. In a weighing scale, iii combination, pendulum load-offsetting mechanism, a chart connected thereto, a projector co-operating iyitli said chart, and manually-operable means for shifting said projector over said chart. 4

'14. In a Weighing scale, in combination, automatic weighing mechanism, and a chart co-operating therewith, said chart having alternate rows ot' weight and money value giadiiations and sliittablc projecting means adapted to (io-operate,selectively with said rows of weight and money value graduations.

15. In a weighing scale, iii combination, automatic weighing niechanism. and a movable chart connected thereto, said chart having alternate rows lot weight and money value graduations and shiftable projectin means adapted to zo-operate selectively witl said rows of Weight and money value gradiiations.

16. In a weighing scale, in combination, automatic weighing mechanism, a movable chart 'connected thereto, said chart having alternate rows of-Weight and money value graduations, and a projector adapted to simultaneously project a money value indication and a weight ndicationfrom adjacentcolumns. Y Y

17. In a Weighing scale, -in combination a chart, a carriage movable therealong, and

'illuminating and projecting means mounted on said carriage.

18. In a weighing scale, in combination, i

oppositely-'facing charts, a. carriage movable along said charts, illuminating means for one of said charts, and projecting means for y the other of said charts, said illuminating and projecting means being mounted upon said carriage.

nanvon o. HEM. 

